1. Caledonian Shanks Centre for Waste Management, School of Built and Natural Environment, Glasgow Caledonian University, Drummond House, Glasgow G3 6RN, Scotland, UK,
2. Caledonian Shanks Centre for Waste Management, School of Built and Natural Environment, Glasgow Caledonian University, Drummond House, Glasgow G3 6RN, Scotland, UK
3. School of Built and Natural Environment, Glasgow Caledonian University, Cowcaddens Road, Glasgow G4 0BA, Scotland, UK